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T494

T494
  • DUAL FREQUENCY NAVIGATION & SURVEYING
  • (OPTIONAL) DEEP-WATER 1800M VARIANT AVAILABLE
  • LOW SIDE LOBES
  • LONG RANGE ECHO SOUNDER
  • TOWED BODY CAPABILITY
  • FULLY OVER-MOULDED

The T494 is a high performance, dual-frequency transducers offering a versatile sounding system with high resolution and excellent range performance. The design features both high and low frequencies combined within a single over-moulded housing. The over-moulded polyurethane housing provides a mechanically robust, corrosion-free transducer for hull or over-side mounting. The transducer is available with or without acoustic calibration which is traceable to National Standards.

Technical Specification

Resonant Frequency (Nominal)
  • 15/210 kHz
Beam Angle (-3db)
  • 20 Degrees Conical @ 15 kHz
  • 7.5 Degrees Conical @ 210 kHz
Bandwidth
  • 3.4 kHz @ 15 kHz
  • 8.5 kHz @ 210 kHz
Transmit Sensitivity
  • 167 dB re 1μPa/V 1m @15 kHz
  • 174 dB re 1μPa/V 1m @210 kHz
Receive Sensitivity
  • -193 dB re 1V/μPa @15 kHz
  • -187 dB re 1V/μPa @210 kHz
Nominal Impedance
  • 140 Ohms @15 kHz
  • 100 Ohms @ 210 kHz
Transmit Voltage / Duty Cycle (Max)
  • 750 Vrms at 10% @ 15 kHz
  • 175 Vrms at 10% @ 210 kHz

Mechanical Specification

Connector
  • Not fitted as standard
  • (Optional Customer Specific)
Operating Temperature
  • -5 to +40 °C
Storage Temperature
  • -40 to +80 °C
Cable Type
  • Ø12mm Polyurethane Jacket, Screened 4 Core
Operating Depth
  • 300m Standard
Cable Length
  • 10 metres standard
  • (Additional lengths supplied to order)
Weight Air/Water (including 10m cable)
  • 33.6 kg / 14 kg

Our Company

Formed in 1990, Neptune Sonar is now a leading company in underwater transducer technology, offering one of the world's largest and most comprehensive range of undersea defence and commercial transducers.

Based in the UK, our research and manufacturing operation is located on a 25-acre site in East Yorkshire. With a 60,000 square metre trials lake and a floating calibration laboratory, the site provides an extensive range of facilities supporting every aspect of acoustic transducer development from modelling and design to final product acceptance.

Neptune Sonar Limited
Kelk Lake
Kelk
East Yorkshire
YO25 8HG

T: 01262 490234
E: sales@neptune-sonar.co.uk
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We design, manufacture and test acoustic sensors and electronics for...

  • Naval Defense
  • Maritime Security
  • Offshore Oil & Gas
  • Hydrographic Survey Industry
  • Oceanographic Science
  • Environmental Sectors
  • Aquaculture